The source on this page is distributed under GPL.
This source does compile now. Do a make within AR/pcre first, then make standalone within the top directory. Then try ./standalone test to run it on the test/main.arc object. Also try setting the ARC environment variable to values between 1 and 5 to get lots of fun information (e.g. ARC=4 ./standalone test).
Note that there's a slight bug in the code I am just in the process of figuring out -- I got the urge of releasing this new version of the code while rewriting the instruction generation code :)
You might want to read The Roadmap first.
arc-source.tar.gz (Size: 261K) - Snapshot of Jul 14
Warning: the source will unpack in the current directory - thus you have to create a directory for it first.